Hydraulic motor



Aug. 1 1, 1925."

D. TOMLINSON HYDRAULIC MOTOR Filed Oct. 5, 1924 pm; Tom lind'on.

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Ffit l hl l FLF'EQE.

HYDRAULIC MOTOR.

Application filed October 3, 1924.

To all whom it may concern.

Be it known that l, DANIEL W. TOMLIN- son, a citizen of the United States, residing at Mansfield, in the county of Douglas and State of li ashington, have invented certain new and useful Improvements in Hydraulic Motors, of whichthe following is a speciiication.

This invention relates to hydraulic motors and has for its object the provision of a motor which may be installed wherever there is a suiiicient water pressure and which will be compact in form and 01 such construction that sections of tubing or pipe which. would ordinarily be considered waste material or junk may be utilized as a casing. Another object of the invention is to provide an impeller or head which will respond quickly to the water pressure and to the velocity of the same so as to rotate a driving shaft for operating machinery. The invention is illustrated in the accompanying drawing and will be hereinafter fully set forth.

In the drawing:

Figure 1 is a plan view of my improved motor;

F 2 is the same;

Fig. is an enlarged longitudinal section through one of the impellers or heads;

Fig. 4c is a section on the line 44- of Fig. 3;

Fig. is a detail showing a slight modification.

In carrying out my invention, I employ a bed plate or foundation 1 which may be of a central longitudinal section of any convenient or preferred construction.

At a proper distance apart upon this bed plate, I erect posts 2 carrying bearings 3 at their upper ends in which the shaft 4 is journaled. The bearings 3 may be of any approved type and are illustrated as containing an oil chamber 5 in which is a chainlubricating device 6 which is loosely tted about the shaft and is adapted to rotate therewith so as to continually raise lubricant "from the lower portion of the oil chamber and carry the same around the shaft to effect thorough lubrication. ltlidway between the posts 2, I secure upon the bed plate a coupling 7 which is shown in the accompanying drawing as a F-coupling, and the inlet pipe or fiume 8 is fitted in the side of this coupling, as clearly shown. In the ends of the coupling 7 are secured the ends of cylin- Serial No. 741,411.

ders 9 which may be threaded directly into the ends of the coupling or may be connected therewith by intermediate collars or rings 10, the interposition of the said rings or collars 10 serving to permit the use of parts having different diameters and also tending to tighten the joint and prevent leakage. The cylinders 9 are, of course, stationary and extend laterally with respect to the inlet pipe 8. lVithin the cylinders adjacent the outer ends thereof are fitted the impellers or heads 11 which are keyed upon the shaft 4, as shown more clearly in Fig. 3. lhese heads or impellers are preferably of circular form having their outer ends reduced, as indicated at 12, whereby to provide clearance for the outflowing water and, at their inner ends, they are provided with packing rings 13 of any approved type which fit closely against the inner surfaces of the respective cylinders and are held thereto by the water pressure, leakage around the heads being thereby effectually prevented. EX- tending longitudinally through each head or impeller, at regular distances circumferentially of the same, arethe inlet ports or passages 14 which open through the inner end of the head but at their outer ends communicate directly with lateral passages 15 which open through the reduced portion 12 of the head. The lateral passages preferably extend on lines at right angles to the longitudinal passages 14 viewed transversely of the head and also at a right angle to the longitudinal passages viewed longitudinally of the head but the latter angle may be varied within definite limits so that the direction of flow of the discharging water may be varied and the best results obtained under any given circumstances. To the outer ends of the cylinders 9 are secured couplings 16 from which outlet pipes 17 extend, and packing boxes 18 are provided at the outer ends of the coupling 16 to prevent leakage around the shaft 4.

A band pulley or its equivalent, 19, is secured upon one end of the shaft 4 so that the power generated by the motor may be transmitted to the machinery to be driven.

In use, the water is admitted to the motor through the inlet 8 and passes directly to the impellers or heads and enters the longitudinal passages 14. of the same, the areaof which is obviously very much restricted relative to the area of the inlet and of the coupling 7 as well as of the cylinder 9 so that the water will exert a high pressure upon the ends of the passages. The water escapes through the lateral passages 15 and the pressure exerted upon the walls of these passages serves to rotate the heads or impellers, and inasmuch as the heads are secured to the shaft at, the said shaft is rotated. The water flowing through the heads exerts such a pressure thereon that a very low head of water will suffice to rotate the shaft and perform certain classes of work while a greater head in the supply will obviously drive larger heads and permit the motor to drive more complicated machinery. The heads, of course, will be provided in various sizes so that a motor may be built suited to the capacity of the stream which is to be utilized as the driving agent, and the heads will, of course, be provided with a greater or a a less number of passages or ports according to the size of the motor in which they are embodied. It will also be understood that, while I have shown two heads 01' impellers disposed at opposite sides of the inlet, the motor may be constructed with only a single head and with one outlet. It will be readily noted that the parts are very compactly arranged and the casing is of such a type that small pieces of pipe or tubing which would be otherwise discarded as mere junk may be utilized in the building of the motor.

It will be understood, of course, that reducing the outer ends of the heads or impellers is for the purpose of providing clearance for the escaping water, but sufficient clearance may be provided without reducing the ends of the head. If conditions permit, the couplings 16 with the outlets 17 may be omitted and the ends of the heads permitted to project from the ends of the cylinders, the diameters of the heads being uniform from end to end as indicated at 20 in Fig. 5. In said figure, a hood 21 of flaring formation is shown secured upon the end of the cylinder 22, providing clearance for the discharging water and also counteracting the formation of spray.

Having thus described the invention, I claim:

1. A hydraulic motor comprising a. cylinder, an inlet pipe connected with one end of the cylinder, a shaft extending axially through the cylinder and rotatably supported, and a head secured upon the shaftwithin the cylinder and adjacent the outlet end of the same, said head having passages therethrough with their inlet ends opening through the inlet end of the head and their outlet ends disposed in the circumferential surface of the head whereby water flowing through the cylinder will effect rotation of the shaft.

2. In a hydraulic motor, the combination of a cylinder, a shaft extending axially through the cylinder and rotatably supported, an inlet pipe communicating with one end of the cylinder, and a head secured upon the shaft within the cylinder adjacent the outlet end thereof, said head being provided with longitudinal passages opening through the inlet end of the head and terminating short of the outlet end thereof, and lateral passages communicating with the outlet ends of the respective longitudinal passages and opening through the circumferential surface of the head at the outlet end of the same, the said outlet end of the same being externally reduced to provide clearance for the discharging water.

In testimony whereof I afiix my signature.

DANIEL w. TOMLINSON. [n 8. 

